Rotary hydraulic apparatus.



W. J. VINCENT.

' ROTARY HYDRAULIC APPARATUS.

APPLICATION FILED AUG PM "4- 1,268,5 15, Patented June 4, 1918.

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w.1. VINCENT.

ROTARY HYDRAULIC APPARATUS.

APPUCATION FILED AUG. 14. 1914.

Patented June 4, 1918.

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To all whom it may concern:

Be it known that 1, WILLIAM JoHN' VI N- cnN'r, a subject of theKinfig'of Great Britaln,

ments in Rotary Hydraulic A paratus, of which the following is a spec'cation.

This invention relates to improvements in rotary hydraulic apparatus andhas reference to that type of apparatus consisting of pumps and motorswherein a variable delivery pump driven at constant speed by a primemover transmits liquid under pressure to a hydraulic motor connected todrive the member or machine to which it is desired to. transmit motionand the speed of the driven member is regulated and controlled byvarying and controlling the stroke or delivery of the pump.

The present invention consists of a particular construction of pump andarrangemerits whereby such pump is combined with a motor for purposes ofa hydraulic transmission gear. I I Y In order that my invention may bemore readily understood and carried into practice, reference is herebymade to the accompartying illustrative drawings wherein:

' Figure 1 is a sectional elevation of a transmission device constructedin accordance with my invention.

Fig. '2, is a partiai sectional plan'of the casing with the rotor andits arts removed. Fig. 3 is a sectional view 0 the casing on line 11 ofFig. .1 looking inthe direction of the arrow B, and

Fig. 4c is a sectional view, the left hand half bein taken on line 2-'2and the right hand hal on line 3-3 of Fig. 1.

Referring to these drawings the numeral 1 designates a casing adapted tobe mounted for instance upon the chassis of a motor vehicle. This casingis divided substantially centrally by partitions or walls 2 so as toform two cylindrical chambers 3 and 4, in one of which 3 a variablestroke pump P is located and in the other of which 4 a motor M'which mayconveniently though not essentially be of similar form to the pump-isarranged. Thepartition 2 consists of a circular disk formed upon the m0-tor side with an eccentric boss 17 and this boss serves to support theend of the shafts 6 and 14. Upon its other side the partitionSpecification of letters Patent. 7 Application filed August 14,1914.Serial at. 858,844.

Wales, have in-J Patented June 4, 1918.

' 2 is cut awa centrally to accommodate the flange 9. an openings 2 maybe provided in the partition to permit free circulation of any workingfluid which leaks past the pistons into the center of the apparatus. Theinner walls of the cylinder bodies of the pump and motor rotate incontact with the partition 2. The variable stroke pump P consists ingeneral of a rotatingcylinder body 11 whose cylinders are open at theirouter ends. Pistons 100 reciprocate in the cylinders, partition members104 being provided in the casing to separate the suction side from thepressure side. Centrally of the casing 1, I provide a cylindrical memher106 which can conveniently be formed integral with, one of the circularside walls 77 of the casing as shown. Upon this central cylindricalmember 106 an inner eccentric sheave 7 is mounted and upon this innersheave a second or outer eccentric sheave 8 is mounted and by means ofinternal teeth 110 in a rim or flange 111 of the outer sheave 8 andexternal teeth 112 on an extension 113'of the inner sheave 7 the twosheaves are geared together by a pinion 21 so that the inion gearingwith both the sheaves can he utilized to insure synchronous movementbetween the two sheaves.

By thismeans the degree of eccentricity of v the strap or ring 115mounted upon the outer sheave 8.to the central axis of the machine canbe varied at will. The teeth on the eccentric sheaves are so arrangedthat they are concentric with the axis of the machine. This strap orring 115 is mounted upon a roller bearing 116 surrounding theoutersheave. The strap or ring 115 is provided in the construction-.;shown on the drawing with flanges such as therein engage theseflanges 120 on the strap or ring 115 and thus definitely drive it as thecylinder body rotates. This strap may however be driven inother ways solong as some means is provided for causing the movement of the cylinderbody or rotor of the machine to be transmitted to the Bring or strap 115whatever the degree of eccentricity of the latter. In the form ofmachine shown in the drawings the rotor is coupled by vmeans of studs toa driving shaft or'spindle but any suitable means may be provided fordriving the rotor.

In order to enable the throw of the cocentric to be varied at will so asto vary the actual stroke of the piston 100 the pinion 21 gearing thetwo eccentric sheaves 7 1t and 8 is connected to or formed integral witha spindle 136 having a rapid threadsuch as is used in an Archimedeandrilland this spindle passes-through a member 19 slidable on anextension 138 of the central cylindrical member 106 upon which theeccentric sheaves 7 and 8 are mounted and it will be readily understoodthat if suitable means are provided for moving this slidable member 19the pinion 21 will be rotated and the throw thus adjusted. This form ofoperating the pinion is advantageous when the whole casing is revolvedas would occur when the pump is employed as part of a transmissionsystem, but where the casing is always stationary as in a pump, any formof device for rotating the pinion may be adopted. In Figs. 1 and 4 itwill be noted the strap or ring 115 is shown at its position of maximumeccen- 33 tricity.

The motor M may be of any desirable form. In the example illustrated themotor is however of precisely the same form as the pump except that noprovision is made to for varying the stroke of the pistons, an eccentricof fixed throw designated by the number 17 being provided. Axially ofthe casing and upon the pump side, I provide a hollow cylindrical member106 which acts to as a bearing or support for a solid shaft or drivingspindle 6, and also serves to support eccentrics 7 and 8, by means ofwhich thestroke of the pump is varied and controlled as beforedescribed. The inner end so of the central shaft or driving spindle 6 isflanged as at 9 and by means of bolts 10 connection is made to therotatable cylinder body or rotor 11 of the pump. The body 11 isindicated both in Fig, 1 and in Fig. 4, and is made in a ring-like form,but having radial apertures therein forming cylinders for the pumppistons 100. Member 11 is mounted within the outer casing 22. Upon themotor side of the apparatus to a hearing or support 12 furnished with abush 13 in alinement with the bearing 106 supporting the driving shaft 6is provided to support the, spindle or shaft 14 to be driven and thisdriven spindle or shaft 14 at at its inner end is adjacent the end ofthe there being continuous circulation of the driving shaft 6. Thedriven shaft 14 aforesaid is by means of a flange 15 connected to therotating member 16 of the motor M. The rotating member 16 of the motoris similar to the member 11 of the pump in form and also is mountedwithin the outer casing ring 22 but is axially displaced from member 11.The outer surface of the bear- .ing 12 supporting the driven spindle 14is the speed of rotation of this driven spindle 14 is dependent upon thestroke of the pump which is dependent uponthe throw of the compoundeccentrics 7, 8. It will be so understood that liquid from the pump P isdelivered through one of the ports 104 to the cylinders of the motor,and operates upon the pistons so that the rotor of the motor which isattached to the spindle 14, is driven around, carrying the pistons withit, and the reciprocation of the pistons returns the liquid to thesuction side of the pump through the other of the ports 104*,

liquid from the pump to the motor and from the motor body again to thepump. The direction of rotation will be dependent upon which side of theprimary axis of the machine the eccentric is arranged. For moving theslidable member 19 to vary the stroke of the pistons I provide a foot orhand lever connected with the collar 18 of the sliding member 19 whichoperates the stroke controlling spindle 20 to rotate the no pinion 21gearing with eccentrics 7 and 8. Similarly I propose to provide foot orhand levers suitably located as part of the gear for operating thebrakes which preferably take the form of contracting bands cooperatingwith brake paths 122 formed upon or attached to the periphery of thecasing 1. The casing as a whole is refer-ably mounted in plumber blocksand all bearings 23 so that at top speed the whole casing can be allowedto rotate as a solid mass with no circulation of fluid and the drivenshaft 14 will rotate at engine speed with very high efficiency. Meansmay be provided for holding the casing stationary 125 when the drivenshaft or spindle 14 will be rotated by the motor M which will asaforesaid be driven by the liquid under pressure delivered from the pumpP. It will be understood that the same working fluid will be circulatedover and over again and provision may if necessary, be provided forcompensating for any slight leakage which might occur from time to time.

For convenience the motor hereinbefore described and illustrated issimilar in construction to the pump but I wish it to be understood thatI do not confine myself to this particular type of motor since variousforms of motor may be employed but the motorwhatever form it may takeispreferably of the same cubic capacity as the pump.

What I claim and desire to secure by Letters Patent is: i

1. A rotary transmission gear comprising in combination a pump structurehaving suction and delivery chambers, radially disposed partitionsbetween said chambers, a rotor rotating within the casing in contactwith said partition, said rotor having radial cylinders therein open attheir outer ends in communication with the suction and delivery chambersof the casing, pistons reciprocating in the said cylinders and closingthe inner ends of said cylinders, a rotatable ring or strap mountedeccentrically relative to the rotor body, an eccentric stationaryrelative to the strap or ring and rotor body, said eccentric beinglocated Within said strap or ring, connections between the inner ends ofthe pistons and the eccentric strap or ring, means for insuring therotation of the eccentric ring in company with the rotor, and ahydraulic motor mounted in the same casing as the pump structure butseparated from it by a dividing diaphragm through which the liquid rotorhaving radial cylinders therein open at their outer ends and incommunicatlon with the suction and delivery chambers of the casing,pistons reciprocating in the cylinders and closing the inner ends ofsaid cylinders, a rotatable strap or ring mounted eccentrically relativeto the rotor body, connections between the inner ends of the piston andthe eccentric strap or ring,a stationary eccentric located within saidstrap or ring and disconnected therefrom, means for varyingtheeccentricity of the eccentric, and a hydraulic motor mounted in thesame casing as the pump structure but separated from it by a dividingdiaphragm through which motor the liquid delivered by the pumpcirculates. v

In testimony whereof I aflix my signature in presence of two witnesses.

WILLIAM JOHN VINCENT. Witnesses:

EDWARD A. EVE, H. D. JAMESON.

